When the concave printing machine prints multi -color, the printed method or indirect local ink coating method is used

When the concave printing machine prints multi -color, the printed method or indirect local ink coating method makes the ink of various colors on the relevant part of the printing surface according to the need. There are two main types of prints used in the concave printing machine, one is the concave version, that is, the shadow version; the other is the carving version. The carving version of the carving has methods such as hand -carved carving, mechanical carving and electronic carving.